Biogas black membrane pool

Abstract

The utility model discloses a marsh gas black film pool, which relates to the field of marsh gas treatment and comprises a foundation pit, a bottom film is laid at the bottom and on the side wall of the foundation pit, the edge of the bottom film extends out of the foundation pit, an outer film is arranged above the foundation pit, and the edge of the outer film is connected with the edge of the bottom film. An air outlet pipe is arranged in a closed cavity formed by the bottom film and the outer film in the inclined direction, and a gravel layer is arranged between the air outlet pipe and the closed cavity. The gas outlet pipe is obliquely arranged, so that the gas outlet pipe can be obliquely arranged between the organic wastes in the process of landfill of the organic wastes, the gas outlet pipe can be conveniently supported and better fixed in position compared with the gas outlet pipe which is vertically and obliquely arranged, and therefore, the bottom film does not need to be opened after the organic wastes are well landfilled, and the gas outlet pipe can be conveniently replaced. And in order to conveniently form synchronous operation with landfill of the organic waste, the gas outlet pipe is formed by connecting a plurality of branch pipes.

Description

Technical Field

[0001] The utility model relates to the field of biogas treatment, and specifically relates to a biogas black film pond. Background Art

[0002] A biogas black film pond is an enclosed pond made of high-density polyethylene plastic film, mainly used for producing and collecting biogas. This kind of pond is mainly used to treat organic wastes, such as agricultural wastes, livestock and poultry manure, food processing wastes, etc., and biogas is generated through the anaerobic digestion process.

[0003] The construction process of a biogas black film pond usually starts with selecting a suitable location and evaluating the terrain and soil conditions. During excavation, it is necessary to carry out according to the designed depth and width to ensure there is enough space to lay the black film. After that, the black film needs to be laid on the bottom and side walls of the excavated foundation pit. Then, organic wastes are landfilled in the foundation pit with the black film laid. After that, the black film is covered at the opening of the foundation pit to complete the enclosure of the foundation pit, and the organic wastes ferment in the closed space to generate biogas.

[0004] When landfilling organic wastes into the foundation pit, it is usually carried out in batches. The landfill is usually divided into multiple areas or "units", and each unit is filled with garbage layer by layer in turn. After each layer is filled, the top film is covered.

[0005] After covering the black film at the opening of the foundation pit, in order to collect biogas, a gas collecting pipe needs to be buried in the black film pond. The existing pipe burying method, in order to facilitate the fixation of the gas collecting pipe, is to reopen the black film, use a rotary drilling rig to drill holes in the organic wastes, then bury the gas collecting pipe into the drilled holes, and then repair the black film around the gas collecting pipe. Therefore, during the process of opening the black film, gas will overflow, polluting the environment and involving a large amount of labor. Content of the Utility Model

[0006] The purpose of the utility model is to provide a biogas black film pond, which is used to solve the problem that in the existing pipe burying method, in order to facilitate the fixation of the gas collecting pipe, the closed black film needs to be reopened, a rotary drilling rig is used to drill holes in the organic wastes, then the gas collecting pipe is buried into the drilled holes, and then the black film around the gas collecting pipe is repaired. Therefore, during the process of opening the black film, gas will overflow, polluting the environment and involving a large amount of labor.

[0007] The technical scheme adopted by the utility model is as follows: a biogas black film pond, including a foundation pit, a bottom film is laid on the bottom and side walls of the foundation pit, the edge of the bottom film extends outside the foundation pit, an outer film is arranged above the foundation pit, the edge of the outer film is connected with the edge of the bottom film, and an air outlet pipe is arranged in the closed cavity formed by the bottom film and the outer film along an inclined direction, and a sand and gravel layer is arranged between the air outlet pipe and the closed cavity for fixing the position of the air outlet pipe.

[0008] Furthermore, the air outlet pipe includes multiple branch pipes.

[0009] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0010] 1. In the present utility model, the air outlet pipe is inclined, so that during the process of landfilling organic waste, the air outlet pipe can be placed between the organic waste along the inclined direction. Compared with the vertical setting, the inclined air outlet pipe is convenient for supporting and better fixing its position. Therefore, it is not necessary to open the bottom film after landfilling the organic waste, which may cause the overflow of harmful gases and a large workload. And in order to facilitate the synchronous operation with the landfilling of organic waste, the air outlet pipe is connected by multiple branch pipes. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present utility model.

[0012] Description of the Reference Numerals:

[0013] 1. Foundation pit; 2. Bottom film; 3. Outer film; 4. Air outlet pipe; 41. Branch pipe; 5. Sand and gravel layer; 6. Flower holes. Specific Embodiments

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] Embodiment 1

[0017] Figure 1 As shown: A biogas black film pond includes a foundation pit 1, a bottom film 2 is laid on the bottom and side walls of the foundation pit 1, the edge of the bottom film 2 extends outside the foundation pit 1, an outer film 3 is arranged above the foundation pit 1, and the edge of the outer film 3 is connected to the edge of the bottom film 2.

[0018] An air outlet pipe 4 is arranged in an inclined direction in the sealed cavity formed by the bottom film 2 and the outer film 3. A sand and gravel layer 5 is arranged between the air outlet pipe 4 and the sealed cavity for fixing the position of the air outlet pipe 4. In order to facilitate the collection of biogas, flower holes 6 are formed on the surface of the lowermost branch pipe 41.

[0019] After the laying of the bottom film 2 is completed, when landfilling organic waste in layers inside it, first fill a part of the organic waste, then place the air outlet pipe 4 on the organic waste in an inclined direction, and then continue to landfill the organic waste to complete the fixation of the air outlet pipe 4. A sand and gravel layer 5 is arranged between the air outlet pipe 4 and the bottom film 2. The sand and gravel layer 5 is made of piled stones. While further supporting and fixing the air outlet pipe 4, it can also prevent organic waste from entering its interior through the flower holes 6 on the surface of the air outlet pipe 4. Since the organic waste is landfilled in layers, in order to facilitate the laying of the air outlet pipe 4, the air outlet pipe 4 is connected by multiple branch pipes 41, which is convenient for synchronous operation with the landfilling of organic waste.

[0020] The air outlet pipe 4 is arranged in an inclined manner, so that during the process of landfilling organic waste, the air outlet pipe 4 can be placed between the organic waste in an inclined direction. Compared with the vertical setting, the inclined air outlet pipe 4 is convenient for supporting it and better fixing its position. Therefore, it is not necessary to open the bottom film 2 after the organic waste is landfilled well, resulting in the problem of harmful gas overflow and large workload. And in order to facilitate synchronous operation with the landfilling of organic waste, the air outlet pipe 4 is connected by multiple branch pipes 41.

[0021] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A biogas black film pool, comprising a foundation pit (1), a bottom film (2) is laid on the bottom and side walls of the foundation pit (1), the edge of the bottom film (2) extends out of the foundation pit (1), an outer film (3) is arranged above the foundation pit (1), the edge of the outer film (3) is connected to the edge of the bottom film (2), characterized in that: An air outlet pipe (4) is arranged in an inclined direction in the closed cavity formed by the bottom film (2) and the outer film (3); a sand and stone layer (5) is arranged between the air outlet pipe (4) and the closed cavity to fix the position of the air outlet pipe (4); and flower holes (6) are opened on the surface of the branch pipe (41).

2. A biogas black film pool according to claim 1, characterized in that: The air outlet pipe (4) comprises a plurality of branch pipes (41).

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